Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Dothideales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Dictyonella circinata

Dictyonella circinata W. H. Hsieh et al., Mycol. Res. 101: 900-901. 1997.

 Description: Mycelium 2.5-3.5 μm wide, hypogenous on fallen leaves, composed of sparse, pale brown hyphae. Ascomata up to 176 μm long and 98 μm high, superficial on mycelium, scattered, discoid, pulvinate, non-ostiolate, with the asci lying parallel in a single layer on a basal 12-20 μm thick mycelium consisting of 3-5 layered, brown, subglobose cells, with thickened mucilaginous walls. The lateral and upper part of the peridium is of textura intricata and covered by loosely interwoven spirally twisted dark brown appendages. Appendages up to 45 μm long and about 1.5 μm broad. Asci 41-45 μm wide, subglobose, bitunicate, 6-8-spored, surrounded by sparse, pale brown, septate and branched hyphae. Ascospores 23-32 × 9-12 μm, oblong, dark brown, muriform, 6-9-transversely septate, constricted at the middle, each segment with at least one longitudinal septum except for the last one or two cells at the ends which are always obliquely septate

Taiwan, Hsinchu County, Kuanwu, 26 Dec. 1994, holotype IMI 369597 and isotype NCHUPP-2330.

 Habitat: On living leaves of Callicarpa formosana Rolfe.



Arx, JA. von. 1963.


W. H. Hsieh

 Note: Five species of Dictyonella have been reported (Arx, 1963). This species is easily distinguished by its unique spirally coiled appendages on the ascomata.